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Spin.cs
executable file
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Spin.cs
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/*
* Copyright(c) 2017 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
using System;
using System.Runtime.InteropServices;
using Tizen.NUI;
using Tizen.NUI.UIComponents;
using Tizen.NUI.BaseComponents;
// A spin control (for continously changing values when users can easily predict a set of values)
namespace Tizen.NUI
{
///<summary>
///Spins the CustomView class.
/// </summary>
/// <since_tizen> 3 </since_tizen>
public class Spin : CustomView
{
private VisualBase _arrowVisual;
private TextField _textField;
private int _arrowVisualPropertyIndex;
private string _arrowImage;
private int _currentValue;
private int _minValue;
private int _maxValue;
private int _singleStep;
private bool _wrappingEnabled;
private int _pointSize;
private Color _textColor;
private Color _textBackgroundColor;
private int _maxTextLength;
// static constructor registers the control type (only runs once)
static Spin()
{
// ViewRegistry registers control type with DALi type registery
// also uses introspection to find any properties that need to be registered with type registry
CustomViewRegistry.Instance.Register(CreateInstance, typeof(Spin));
}
/// <summary>
/// Creates an initialized spin.
/// </summary>
/// <since_tizen> 3 </since_tizen>
public Spin() : base(typeof(Spin).FullName, CustomViewBehaviour.RequiresKeyboardNavigationSupport)
{
}
/// <summary>
/// Value to be set in the spin.
/// </summary>
/// <since_tizen> 3 </since_tizen>
[ScriptableProperty()]
public int Value
{
get
{
return _currentValue;
}
set
{
NUILog.Debug("Value set to " + value);
_currentValue = value;
// Make sure no invalid value is accepted
if (_currentValue < _minValue)
{
_currentValue = _minValue;
}
if (_currentValue > _maxValue)
{
_currentValue = _maxValue;
}
_textField.Text = _currentValue.ToString();
}
}
/// <summary>
/// Minimum value of the spin value.
/// </summary>
/// <since_tizen> 3 </since_tizen>
[ScriptableProperty()]
public int MinValue
{
get
{
return _minValue;
}
set
{
_minValue = value;
}
}
/// <summary>
/// Maximum value of the spin value.
/// </summary>
/// <since_tizen> 3 </since_tizen>
[ScriptableProperty()]
public int MaxValue
{
get
{
return _maxValue;
}
set
{
_maxValue = value;
}
}
/// <summary>
/// Increasing, decreasing step of the spin value when up or down keys are pressed.
/// </summary>
/// <since_tizen> 3 </since_tizen>
[ScriptableProperty()]
public int Step
{
get
{
return _singleStep;
}
set
{
_singleStep = value;
}
}
/// <summary>
/// Wrapping enabled status.
/// </summary>
/// <since_tizen> 3 </since_tizen>
[ScriptableProperty()]
public bool WrappingEnabled
{
get
{
return _wrappingEnabled;
}
set
{
_wrappingEnabled = value;
}
}
/// <summary>
/// Text point size of the spin value.
/// </summary>
/// <since_tizen> 3 </since_tizen>
[ScriptableProperty()]
public int TextPointSize
{
get
{
return _pointSize;
}
set
{
_pointSize = value;
_textField.PointSize = _pointSize;
}
}
/// <summary>
/// The color of the spin value.
/// </summary>
/// <since_tizen> 3 </since_tizen>
[ScriptableProperty()]
public Color TextColor
{
get
{
return _textColor;
}
set
{
NUILog.Debug("TextColor set to " + value.R + "," + value.G + "," + value.B);
_textColor = value;
_textField.TextColor = _textColor;
}
}
/// <summary>
/// Maximum text lengh of the spin value.
/// </summary>
/// <since_tizen> 3 </since_tizen>
[ScriptableProperty()]
public int MaxTextLength
{
get
{
return _maxTextLength;
}
set
{
_maxTextLength = value;
_textField.MaxLength = _maxTextLength;
}
}
/// <summary>
/// Reference of TextField of the spin.
/// </summary>
/// <since_tizen> 3 </since_tizen>
public TextField SpinText
{
get
{
return _textField;
}
set
{
_textField = value;
}
}
/// <summary>
/// Show indicator image, for example, up or down arrow image.
/// </summary>
/// <since_tizen> 3 </since_tizen>
public string IndicatorImage
{
get
{
return _arrowImage;
}
set
{
_arrowImage = value;
_arrowVisual = VisualFactory.Instance.CreateVisual(
new PropertyMap().Add(Visual.Property.Type, new PropertyValue((int)Visual.Type.Image))
.Add(ImageVisualProperty.URL, new PropertyValue(_arrowImage))
.Add(ImageVisualProperty.DesiredHeight, new PropertyValue(150))
.Add(ImageVisualProperty.DesiredWidth, new PropertyValue(150)));
RegisterVisual(_arrowVisualPropertyIndex, _arrowVisual);
}
}
// Called by DALi Builder if it finds a Spin control in a JSON file
static CustomView CreateInstance()
{
return new Spin();
}
/// <summary>
/// Overrides the method of OnInitialize() for the CustomView class.<br />
/// This method is called after the control has been initialized.<br />
/// Derived classes should do any second phase initialization by overriding this method.<br />
/// </summary>
/// <since_tizen> 3 </since_tizen>
public override void OnInitialize()
{
// Initialize the propertiesControl
_arrowImage = Tizen.Applications.Application.Current.DirectoryInfo.Resource + "picture.png";
_textBackgroundColor = new Color(0.6f, 0.6f, 0.6f, 1.0f);
_currentValue = 0;
_minValue = 0;
_maxValue = 0;
_singleStep = 1;
_maxTextLength = 0;
// Create image visual for the arrow keys
_arrowVisualPropertyIndex = RegisterProperty("ArrowImage", new PropertyValue(_arrowImage), Tizen.NUI.PropertyAccessMode.ReadWrite);
_arrowVisual = VisualFactory.Instance.CreateVisual(
new PropertyMap().Add(Visual.Property.Type, new PropertyValue((int)Visual.Type.Image))
.Add(ImageVisualProperty.URL, new PropertyValue(_arrowImage))
.Add(ImageVisualProperty.DesiredHeight, new PropertyValue(150))
.Add(ImageVisualProperty.DesiredWidth, new PropertyValue(150)));
RegisterVisual(_arrowVisualPropertyIndex, _arrowVisual);
// Create a text field
_textField = new TextField();
_textField.PivotPoint = Tizen.NUI.PivotPoint.Center;
_textField.WidthResizePolicy = ResizePolicyType.SizeRelativeToParent;
_textField.HeightResizePolicy = ResizePolicyType.SizeRelativeToParent;
_textField.SizeModeFactor = new Vector3(1.0f, 0.45f, 1.0f);
_textField.PlaceholderText = "----";
_textField.BackgroundColor = _textBackgroundColor;
_textField.HorizontalAlignment = HorizontalAlignment.Center;
_textField.VerticalAlignment = VerticalAlignment.Center;
_textField.Focusable = (true);
_textField.Name = "_textField";
_textField.Position2D = new Position2D(0, 40);
this.Add(_textField);
_textField.FocusGained += TextFieldKeyInputFocusGained;
_textField.FocusLost += TextFieldKeyInputFocusLost;
}
/// <summary>
/// Overrides the method of GetNaturalSize() for the CustomView class.<br />
/// Returns the natural size of the actor.<br />
/// </summary>
/// <returns> Natural size of this spin itself.</returns>
/// <since_tizen> 3 </since_tizen>
public override Size2D GetNaturalSize()
{
return new Size2D(150, 150);
}
/// <summary>
/// An event handler is used when the TextField in the spin gets the key focus.<br />
/// Make sure when the current spin that takes input focus, also takes the keyboard focus.<br />
/// For example, when you tap the spin directly.<br />
/// </summary>
/// <param name="source">Sender of this event.</param>
/// <param name="e">Event arguments.</param>
/// <since_tizen> 3 </since_tizen>
public void TextFieldKeyInputFocusGained(object source, EventArgs e)
{
FocusManager.Instance.SetCurrentFocusView(_textField);
}
/// <summary>
/// An event handler when the TextField in the spin looses it's key focus.
/// </summary>
/// <param name="source"></param>
/// <param name="e"></param>
/// <since_tizen> 3 </since_tizen>
public void TextFieldKeyInputFocusLost(object source, EventArgs e)
{
int previousValue = _currentValue;
// If the input value is invalid, change it back to the previous valid value
if (int.TryParse(_textField.Text, out _currentValue))
{
if (_currentValue < _minValue || _currentValue > _maxValue)
{
_currentValue = previousValue;
}
}
else
{
_currentValue = previousValue;
}
// Otherwise take the new value
this.Value = _currentValue;
}
/// <summary>
/// Overrides the method of GetNextKeyboardFocusableView() for the CustomView class.<br />
/// Gets the next key focusable view in this view towards the given direction.<br />
/// A view needs to override this function in order to support two-dimensional key navigation.<br />
/// </summary>
/// <param name="currentFocusedView">The current focused view.</param>
/// <param name="direction">The direction to move the focus towards.</param>
/// <param name="loopEnabled">Whether the focus movement should be looped within the control.</param>
/// <returns>The next keyboard focusable view in this control or an empty handle if no view can be focused.</returns>
/// <since_tizen> 3 </since_tizen>
public override View GetNextFocusableView(View currentFocusedView, View.FocusDirection direction, bool loopEnabled)
{
// Respond to Up/Down keys to change the value while keeping the current spin focused
View nextFocusedView = currentFocusedView;
if (direction == View.FocusDirection.Up)
{
this.Value += this.Step;
nextFocusedView = _textField;
}
else if (direction == View.FocusDirection.Down)
{
this.Value -= this.Step;
nextFocusedView = _textField;
}
else
{
// Return null
return null;
}
return nextFocusedView;
}
}
}